a dirty Carroyo is when your having sex with your spouse or what not and decide to spice things up a bit by hitting her in the back of the head with a terracotta teapot. That is done if the sex is bad, or maybe they have upset you in some way earlier. this often causes them to tense up or to be knocked out. either way it is a exciting thing to do. this was created from a parody or spoof from a mayor of Miami that threw a terracotta teapot at his wife one night.

i.e. i gave that bitch a dirty Carroyo last night. thats the last time she will spit instead of swallow.
i.e. i gave that girl a dirty Carroyo since she is like a dead fish in bed.